India, Sept. 14 -- An anti-immigration protest led by far-right activist Tommy Robinson gained momentum in the United Kingdom on Saturday as thousands of people gathered in central London.

The massive crowd showed up with flags and banners supporting Tommy Robinson, who is one of Britain's most influential far-right figures.

At least 25 people were arrested on Saturday after violent clashes erupted during one of the largest right-wing demonstrations in recent years, the London's Metropolitan Police Service said. The "Unite the Kingdom" rally, organised by Robinson, drew an estimated 110,000 to 150,000 participants to central London.

Tommy Robinson is a far-right activist known for his anti-immigrant and anti-Islam rhetoric. He was born...